{"id":642,"date":"2012-11-19T16:57:00","date_gmt":"2012-11-19T14:57:00","guid":{"rendered":"https:\/\/lisas.de\/~adrian\/posts\/2012-Nov-19-new-raid-2.html"},"modified":"2026-03-30T22:41:25","modified_gmt":"2026-03-30T20:41:25","slug":"new-raid","status":"publish","type":"post","link":"https:\/\/lisas.de\/luges\/index.php\/2012\/11\/19\/new-raid\/","title":{"rendered":"New RAID"},"content":{"rendered":"<p>For our <a href=\"http:\/\/ftp-stud.hs-esslingen.de\/info\/\">mirror server<\/a> we now have a third RAID which is also used for the mirror data. The previous external RAIDs (12x1TB as RAID5 + hot spare) were reaching their limits and so additional 11x1TB as RAID6 in the remaining internal slots are a great help to reduce the load and usage of the existing disks. There are now roughly 30TB used for mirror data.<\/p>\n<p>To create the filesystem on the new internal RAID I have used <a href=\"http:\/\/busybox.net\/~aldot\/mkfs_stride.html\">http:\/\/busybox.net\/~aldot\/mkfs_stride.html<\/a>. With 11 disks, a RAID level of 6,\u00a0 RAID chunk size of 512 KiB and number of filesystem blocks of 4KiB I get the following command to create my <em>ext4<\/em> filesystem:<\/p>\n<div class=\"highlight\">\n<pre><span><\/span><code>mkfs.ext4 -b 4096 -E stride=128,stripe-width=1152 <\/code><\/pre>\n<\/div>\n<p>I am now moving all the data from one of the external RAIDs to the new internal RAID because the older external RAID still uses <em>ext3<\/em> and I would like to recreate the filesystem using the same parameter calculation as above. Once the filesystem has been re-created I will distribute our data evenly across the three RAIDs (and maybe also mirror a new project).<\/p>\n<p><strong>Update<\/strong>: After moving the data from one of the external RAIDs to the internal RAID the filesystem has been re-created with:<\/p>\n<div class=\"highlight\">\n<pre><span><\/span><code>mkfs.ext4 -b 4096 -E stride=128,stripe-width=1280 <\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>For our mirror server we now have a third RAID which is also used for the mirror data. The previous external RAIDs (12x1TB as RAID5 + hot spare) were reaching their limits and so additional 11x1TB as RAID6 in the remaining internal slots are a great help to reduce the load and usage of the [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-642","post","type-post","status-publish","format-standard","hentry","category-luges"],"_links":{"self":[{"href":"https:\/\/lisas.de\/luges\/index.php\/wp-json\/wp\/v2\/posts\/642","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lisas.de\/luges\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lisas.de\/luges\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lisas.de\/luges\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lisas.de\/luges\/index.php\/wp-json\/wp\/v2\/comments?post=642"}],"version-history":[{"count":5,"href":"https:\/\/lisas.de\/luges\/index.php\/wp-json\/wp\/v2\/posts\/642\/revisions"}],"predecessor-version":[{"id":1904,"href":"https:\/\/lisas.de\/luges\/index.php\/wp-json\/wp\/v2\/posts\/642\/revisions\/1904"}],"wp:attachment":[{"href":"https:\/\/lisas.de\/luges\/index.php\/wp-json\/wp\/v2\/media?parent=642"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lisas.de\/luges\/index.php\/wp-json\/wp\/v2\/categories?post=642"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lisas.de\/luges\/index.php\/wp-json\/wp\/v2\/tags?post=642"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}